Year	current US$
2002	19251381.2579572
2003	20741126.2420248
2004	21164224.9587502
2005	27668228.6157239
2006	50185772.1208052
2007	55565417.8984175
2008	67950370.4992411
2009	92403339.0568041
2010	82719576.3353151
2011	87380356.2245947
2012	68282196.6126415
2013	61223808.274811
2014	47883853.154252
2015	28730855.7382586
2016	59857716.3259552